This project was an addition to an existing data center of a 10,000 gallon Fireguard tank and triplex pumpset to serve four existing generators. The Preferred Utilities programmable logic controller-based system distributes fuel from the main tank to a massive belly tank on one generator, and from this belly tank to three other generators. The fuel system has a pumped return to simplify the piping and to keep the piping off the floor of the generator room.